How to find the function and the menu (or button) corresponding to a shortcut (knowing only shortcut keys)?
By searching for it
You can look through Blender's UI and check all the menus. It is often possible to find a lot using this obvious and simple way, or you could also search the key map in the user preferences(F4 -&gt; p):

Note that you can have one hotkey that does different things depending on the context(what editor or thing you hover your mouse above, what mode you are in, what you have selected and things like that).